<template>
  <div class="login_container">
    <div class="login_box">
      <!-- 头像区域 -->
      <div class="avator_box"><img src="../assets/logo.png"></div>
      <!-- 登陆表单区域 -->
      <el-form ref="loginFormRef" :model="loginForm" :rules="loginFormRules" label-width="0px" class="login_form">
        <!-- 用户名 -->
        <el-form-item prop="username">
          <el-input v-model="loginForm.username" prefix-icon="iconfont icon-user"></el-input>
        </el-form-item>
        <!-- 密码 -->
        <el-form-item prop="password">
          <el-input v-model="loginForm.password" prefix-icon="iconfont icon-3702mima" type="password"></el-input>
        </el-form-item>
        <el-form-item class="btns">
          <el-button type="primary" @click="login">登陆</el-button>
          <el-button type="info" @click="resetLoginForm">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>
<script>
  export default {
    data () {
      return {
        // 登陆表单的数据绑定对象
        loginForm: { username: 'admin', password: '123456' },
        // 表单的验证规则对象
        loginFormRules: {
          username: [
            { required: true, message: '请输入用户名', trigger: 'blur' },
            { min: 3, max: 10, message: '长度在3到10个字符之间', trigger: 'blur' }
          ],
          password: [
            { required: true, message: '请输入登陆密码', trigger: 'blur' },
            { min: 6, max: 15, message: '长度在6到15个字符之间', trigger: 'blur' }
          ]
        }
      }
    },
    methods: {
      // 重置表单
      resetLoginForm () {
        this.$refs.loginFormRef.resetFields()
      },
      login () {
        this.$refs.loginFormRef.validate(async valid => {
          if (!valid) return
          const { data: res } = await this.$http.post('login', this.loginForm)
          if (res.meta.status !== 200) return this.$message.error('登陆失败')
          this.$message.success('登陆成功')
          window.sessionStorage.setItem('token', res.data.token)
          this.$router.push('/home')
        })
      }
    }
  }
</script>
<style lang="less" scoped>
  .login_container {
    background-color: #2b4b6b;
    height: 100%;
  }

  .login_box {
    width: 450px;
    height: 300px;
    background-color: #fff;
    border-radius: 3px;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);

    .avator_box {
      width: 130px;
      height: 130px;
      border: 1px solid #eee;
      border-radius: 50%;
      padding: 10px;
      box-shadow: 0 0 10px #ddd;
      position: absolute;
      left: 50%;
      transform: translate(-50%, -50%);
      background-color: #fff;

      img {
        width: 100%;
        height: 100%;
        border-radius: 50%;
        background-color: #eee;
      }
    }
  }

  .login_form {
    position: absolute;
    bottom: 0;
    width: 100%;
    padding: 0 20px;
    box-sizing: border-box;
  }

  .btns {
    display: flex;
    justify-content: flex-end;
  }
</style>
